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Marquise|Lab Grown|IGI

12.55ct G VVS2 Marquise Lab Grown Diamond

ID • G/VVS2 • IGI LG797606340

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG797606340

Diamond specifications and retailer prices

From £2,116 GBP
$2,839 USD
As of November 1, 2026
Save £1,781 GBP (46%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £3,897 GBP at Brilliance · As of November 1, 2026
View at Brilliance

About this 12.55ct lab-grown marquise diamond

This 12.55ct lab-grown marquise sits in the over five carat band, graded G colour (near-colourless) and VVS2 clarity (very-very-slightly-included), with a top-tier cut grade and certified by IGI LG797606340 or 797606340. Listed at 2 retailers as of November 1, 2026, with prices from £2,116 to £3,897, a £1,781 spread on the same certified stone. Brilliance lists it at £3,897. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

12.55
Carat
G
Colour
VVS2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.9°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG797606340
Dimensions24.22 × 12.15 × 7.47 mm
L/W Ratio1.99
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
24.22 mm12.15 mm12.55 ctG / VVS2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG797606340
Side View
Table 59.0%Crown 34.9°Girdle: STK-THKPavilion 40.3°Culet: NoneDepth 61.5%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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Price History

Last verified: Nov 1
Current: £3,897 GBP|Low: £2,033 GBP|High: £10,553 GBP|Avg: £4,494 GBP|-14.3%
Brilliance
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 27, 2026
Retailer 2£2,116 GBP
Retailer 5£2,274 GBP
Retailer 7£2,364 GBP
Brilliance£3,897 GBP
Retailer 4£4,504 GBP
Retailer 6£5,375 GBP
Retailer 3£10,553 GBP

10 data points across 7 retailers

2 retailers£2,116 GBP to £3,897 GBP

B+
Cheapest Retailer
-
£2,116 GBP
$2,839 USD
Most Expensive
B+
Brilliance
D41922779 · Nov 1
£3,897 GBP
$5,229 USD
View
1 more retailer has this diamond
Prices start from £2,116 GBPSave up to £1,781 GBP

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

B+
12.55ct Marquise
£2,116 GBP